I try to look at this kind of stuff from my own perspective. If there's something I don't like, I don't want my man to do it to me. I'd rather he do what feels good to ME. If I asked him to avoid a certain spot, and focus more on another spot because it feels better... I'd really appreciate it if he did what I asked. It would feel better to me, and build our trust.
I would also be willing to talk to him about things he'd like to do "to me" that aren't my favorite things. Perhaps we could make a deal that he could do them sometimes, but certainly not every time, especially if it isn't something I actually like.
When I look at things like this from my perspective, it usually helps me make a better decision on how to treat him. I would prefer to treat him the way I'd like to be treated.